@each $class in $background-image-classes {
	$i: index($background-image-classes, $class);
	$image: nth($background-image-define, $i);

	.#{$class}{
		background: url("#{$image}") no-repeat;//&*bg
		background-size: cover;
    background-attachment:fixed;
    background-position:center bottom;
	}
}